Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating activities:
Net income (loss)	$ 12,857	$ (176)
Adjustments to reconcile net income to net cash provided provided by operating activities:
Depreciation and amortization	10,720	11,540
Deferred income tax	1,390	1,011
Gain on sale of property, plant and equipment	(37)	(120)
Provision for uncollectible accounts	5,544	451
Stock-based compensation expense	3,509	3,168
Excess Tax Benefit from Share-based Compensation, Operating Activities	(3,245)	(1,731)
Other	119	118
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions:
Accounts receivable	(13,820)	(9,243)
Costs and estimated earnings in excess of billings on uncompleted contracts	4,328	3,435
Inventories	85	32
Other assets and liabilities	(8,861)	3,247
Accounts payable	(16,743)	(19,429)
Billings on uncompleted contracts in excess of costs and estimated earnings	17,436	19,174
Accrued expenses	(6,840)	(6,099)
Net cash provided by operating activities	6,442	5,378
Investing activities:
Acquisition of property, plant and equipment	(7,516)	(7,711)
Acquisition, net of cash acquired	0	(5,551)
Proceeds from asset sales	145	290
Net cash used by investing activities	(7,371)	(12,972)
Financing activities:
Proceeds from Noncontrolling Interests	8,433	0
Issuances of common stock	457	364
Excess tax benefit of exercised stock options and vesting of deferred shares	3,245	1,731
Advances under credit agreement	2,753	9,272
Repayments of advances under credit agreement	(4,331)	(9,104)
Proceeds from issuance of common stock under employee stock purchase plan	166	134
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(4,488)	(2,439)
Net cash provided (used) by financing activities	6,235	(42)
Effect of exchange rate changes on cash and cash equivalents	(2,114)	(911)
Increase (decrease) in cash and cash equivalents	3,192	(8,547)
Cash and cash equivalents, beginning of period	79,239	77,115
Cash and cash equivalents, end of period	82,431	68,568
Supplemental disclosure of cash flow information:
Income taxes	9,112	5,905
Interest	521	748
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 726	$ 185